Means for producing a neck finish with a thread hang-up



" June 16, 1936.

N. R. BECK MEANS,FOR PRODUCING A NECK FINISH WITH A THREAD HANG-UP Filed May 9, 1935 2 Sheets-Sheet 1 jfofimanjiibeclil June 16, 1936- N. R. BECK 2,044,115

MEANS FOR PRODUCING A-NECK FINISH WITH A THREAD HANG-UP Filed May 9, 1955 2 Sheets-Sheet 2 Patented June 16,1936 I v v 2,044,115

UNITED STATES PATENT OFFICE MEANS FOR PRODUCING A NECK FINISH WITH A THREAD HANG-UP Norman R. Beck, Baltimore, .Md., assignor to 'Carr-Lowrey Glass 00., Baltimore, Md.

Application May 9, 1935, Serial No. 20,657

1 Claim. (Cl. 49-69) This invention relates to a means for producstruction and combinations of parts hereinafter ing a bottle or other glass container the neck more fully describedand pointed outin the-claims, finish of which isprovided witha thread hang-up. it being understood that changes may be made As is well known to those skilled in the art of without departing from the spirit of the invention 5 bottle manufacture, it has been necessary heretoor the scope of the appended claims. V

fore, in the manufacture of glass bottles and the In the accompanying drawings have been like in gob machines, to provide the neck finish shown the several steps essential to the producwith either a ball hang-up, an undercut hangtion in a gob machine of a glass bottle or the like up, or a hang-up in the form of a concealed ball. having a thread hang-up.

1 All of these hang-ups .have been objectionable for In said drawings one reason or another. In the first place a ball Figure 1 is a section through portions of an hang-up mars the appearance of the neck finish open blow mold to which a parison has been in that it constitutes an annular enlargement transferred by a neck ring, the neck ring being necessitating a longer neck than would be reshown in position directly over the blow mold folquired otherwise. An undercut hang-up tends to lowing the transfer of the parison but prior to 15 weaken the neck finish and frequently in the the closing of the mold and the removal of the manufacture of bottles with a hang-up of this neck ring. type, the orifice in the neck has been choked and Figure 2 is a view similar to Figure 1 showing interfered with the proper use of the bottle for the members of the blow mold closed aboutthe the purpose intended. Where a concealed ball is parison prior to the removal of the neck ring. 20 used as a hang-up a very long cap is required as Figure 3 is a similar view following the removal a closure for the purpose of concealing the ball, of the neck ring and release of the parison which this cap generally extending down to the shoulder has gravitated into such position as to cause the portion of the bottle. thread of its neck finish to constitutea hang-up.

While it has been possible heretofore to pro- Figure 4 is a section on the line 4-4, Figure 3 25 duce in suction machines, glass bottles and other following the completion of the blowing operacontainers with threaded neck finishes and withtion and the opening of the blow mold, the takeout ball or undercut hang-ups, this being due to out plates being shown in engagement with the the fact that the neck ring travels with the bottle neck finish as a preliminary step toward removthrough every stage of its formation, the same ing the finished bottle or the like from the ma- 3O advantageous results have not been obtainable chine. with gob machines wherein the neck ring leaves Figure 5 is a plan view of portions of the blow the parison immediately following the transfer mold showing the seat surrounding the neck thereof from the blank mold to the blow mold. opening for engagement with the thread hang-up.

Heretofore in such machines, in order to prevent Figure 6 is a section through the upper portion 35 the neck finish from becoming distorted by setof the blow mold taken on the line 6-6, Figure 5. tling in the blow mold prior to the blowing opera- Referring to the figures by characters of refertion, some type of hang-up such as a ball or an ence I and 2 designate the opposed members undercut has been necessary in addition to the of the blow mold of a gob machine, these memthread finish produced in the neck ring. bers, when brought together as in Figures 2, 3 40 An object of the present invention is to proand 5, cooperating to form a cavity 3 therebevide a means whereby the neck portion of a paritween for the reception of a parison P and the son, when formed with a thread finish in a gob subsequent shaping of the finished bottle or other machine, need not be formed with an additional container B. The members I and2 also cooperate portion for use as a hang-up but the thread finat their upper ends to form a neck opening 4 5 ish, on the contrary, will constitute an eificient therebetween adapted to receive the neck finish hang-up for supporting the neck finish in proper N of the parison. position in the blow mold to which the parison The ordinary neck ring of a gob machine has has been transferred, thereby allowing the probeen indicated at 5 and is used not only for duction of bottles or the like having short necks shaping the neck finish after the gob has been 50 with thread finishes and without supplemental deposited in the blank mold, but also for transhang-ups. I ferring the parison from the blank mold to the With the foregoing and other objects in view. open blow mold, it being understood that upon which will appear as the description proceeds the the completion of this transfer the neck ring invention resides in certain novel details of con-. will fit snugly on the top of the blow mold a 55 shown, at the same time supporting the parison in properly centered position in the blow mold. The neck ring 5 is designed to form a thread finish T on the neck of the parison, this thread having any desired number of convolutions.

The opening 4 is enlarged at its upper end to provide a spiral seat 6 extending once around the opening with its ends terminating at the upper and lower ends respectively of a shoulder or abutment 1 as shown particularly in Figure 6. The seat 6 has the same pitch as the lower con- 7 volution of the thread T and the shoulder '1 the means stated, it becomes possible to produce formed by the seat is located where it will be directly under the lower end of thread T when the mold is closed.

With the blow mold formed as described and the parison provided with a neck finish having a thread properly pitched with respect to the seat 6, it will be apparent that the following operations in the formation of the bottle or the" like will take place in succcession: The neck finish T will be formed in the neck ring in the usual manner after the gob has been deposited in the blank mold and then blown to produce a parison; thereafter the neck ring will transfer the parison P to the open blow mold where it will be suspended by the neck ring in a properly centered position as shown in Figure 1; the mold will then close about the neck finish as shown in Figure 2 while the parison is still being supported by the neck ring and immediately following the closing of the mold the neck ring will open and move back to its initial position in the machine, thereby releasing the neck finish which will drop by gravity a distance slightly greater than the Width of a thread until the lower convolution of the thread T comes into contact with the correspondingly pitched seat 6 as shown in Figure 3.

The seat and the lower convolution of the thread will cooperate to support the parison in vertical position without distortion and as efficiently as though an ordinary ball hang-up had been employed. It will be noted that when the thread T is on the seat 6 the end thereof will be held in contact with the shoulder 1 so that there is no danger of the parison rotating on its seat.

Following the positioning of the thread hangup on its seat 6 the usual blow head is brought to position on the mold and the blowing of the bottle is completed.

It will be understood of course that by utilizing in a gob machine a bottle or other glass container utilizing the thread of its neck finish as ahang-up so that it becomes unnecessary to form the neck with an unsightly ball hang-up, or a weakening undercut hang-up. On the contrary a very short neck with a thread finish can be produced on machines in which such production has heretofore been impossible. A further advantage resulting from the use of this invention is found in the fact that when the thread finish is seated in the enlarged upper end portion of the neck opening in the mold,

the thread on the neck of the parison extends up to the wall of the opening, as shown in Figure 3. Thus there is no danger of distorting this portion of the neck finish (which is the hottest and softest) when the air is blown through the neck into the suspended parison.

What is claimed is:

A blow mold for a glass forming machine having a neck opening with an enlarged upper end portion, and a helical shoulder at the bottom of the enlarged portion of the opening, said shoulder being pitched to correspond with the pitch of the lower convolution of a threaded neck finish and providing a seat for said convolution.

NORMAN R. BECK. 

